Pot type oil burner



June. 16, 1953 B; -R. ANDEiassoN 4 ET AL POT TYPE OIL BURNER 3 Sheets-Sheet 1 iled Ju 1y 3, 1950 IN N TOR S BLWGT RUDOZF ANDfRSSON AND KARLfR/K V/[HHM QVARFORDT ATTORNEY:

June 16, 1953 Filed July 5. 1950 B. R. ANDERSSON EFAL 2, 30

POT TYPE OIL BURNER 3 Sheets-Sheet 2 .Fig'. E

ATTO ivsvs June 16, 1953 B..R..ANDERS$ON ETAL 2,642,130

v POT TYPE QIL..BURNER Filed July 3, 1950 3 Shee ts- Sh eet I5 IIY VEIYTORS BENGT Rl/Mlf ANDRSONm KARL mm mHa/u QVARFORDT Patented June 16, 195? 7 UNITED STATES PATENT OFFICE i "for TYPE oIL BUnNEa. Bengt Rudolf'hndersson and Karl Erik Vilhelm 'Qvarfordt, Gothenburg, Sweden Application July 3, 1930, Serial No. 171,976. I x v In Sweden November 11,1947

The present invention relates to improvements in oil burners and'it consists of the constructions, combinations and arrangements herein described andcl'aimed. l

. The main object. of the invention is toprovide an oil burner, which gives a clean flame free from soot, and which prevents the accumulation of carbon.

The accompanying drawings illustrate a selected embodiment of the invention and the views therein are as follows:

Figure 1 is a diagrammatic sectional side view of the burner with means for supplying oil and air to the same,

Figure 2 is a sectional view of the complete burner on a larger scale, I

Figure 3 is aview of the burner seen in the direction of the arrows III-III in Figure 2,

Figure 4 is a horizontal section on the line IV.IV of Figure 2,

Figure 5 is a diagrammatic section on the line V--V of- V Figure 6, which shows the permeable bottom of the combustion chamber seen from below.

In the drawings I designates a cylindrical casing of sheet metal open at its upper end and provided with a bottom 2. Within said casing and secured to its bottom by means of bolts 3 there is a cylindrical receptacle 4 coaxially disposed in relation to the casing I and of less width so as to form a cylindrical space 5 therebetween. The lower portion of the receptacle 4 is filledup by a cup-shaped member I of cast iron the bottom of which is pierced by openings 8, and to the lower portion of the receptacle 4 there is connected an oil supply pipe 9 in front of which the member I is provided with a radial channel I0 through which the oil flows to the openings 8 and up to the space formed by the concave surface ofthe member I. By means of devices which do not form a part of this invention but are diagrammatically shown to the right in Figure 1 the level of the oil in the cup-shaped member I may be varied and the oil maintained at the desired level. A pressure air supply pipe H surrounding the oil supply pipe 9 is connected to the lower portion of the casing, and the receptacle 4 is provided with outwardly projecting spiral-shaped flanges I2 which give the air supplied through the pipe II a rotational movement around the casing I. On the top edge of the casing I a ring I3 is resting which carries a funnel I4, the narrower bottom end of which projects down into the receptacle 4. At its top end the funnel I4 is provided with an outwardly projecting flange I5 which by means of angular pieces I6 and screws I1 is kept *3 Claims. (01. 158-91) a somewhat spaced from an annular, conical ring;

I 8 secured to the supporting ring I3 and of a smaller inner diameter than the inner diameter of said ring I3. In an annular slot IBa formed betweenlthe flange I5 and the ring I8 there are provided a series of obliquely disposed guiding members I9 dividing said slot I8a in channels tangentially disposed in relation to the space surrounded by the ring I8. The funnel I4 which is provided'at its lower end with a series of air supply apertures 20 is surrounded by a funnelshaped mantle 2|, between which and the funnel I4 there is formed a space 2Ia, and the bottom edge portion 22 of the mantle 2I is bent inwardly to contact the funnel I4. The space2la between the mantle 2I and the funnel I4 communicates at its upper end with the interior of the casing I so as to permit air to flow down to the apertures 20 and into the funnel I4. At its outer side the mantle 2I is jacketed with asbestos 23 or other suitable heat-insulating material. Between said jacket 23 and the top edge of the receptacle 4 there is formed an annular space 24 through which the air flows down to the cup-shaped member I containing the oil.

In the bottom opening of the funnel I4 there is by means of springs 30 detachably secured a gasifying member 3I. This member consists of two metal net ribbons 3Ia and 3Ib, respectively, of mutually dififerent width which are coiled or. rolled to form a somewhat conical spiral. The inner portion of the spiral is formed by the narrower ribbon 3Ib, and as this inner portion i's formed one coils or rolls both ribbons to complete the spiral which is inserted in and is secured to a cylindrical ring 34 which is inserted from below in the bottom opening of the funnel I4. The ring 34 is formed with an outwardly projecting flange 35 around the outer edge of which the springs 30 secured to the mantle 2I clip by their free ends. The metal net of which the ribbons 3Ia and 3Ib are made may have a mesh size of about 2 millimeters and be manufactured of iron wire with a diameter of about 0.3 millimeter. The widths of the net ribbons may be 20 and 10 millimeters, respectively. In the drawings the turns or windings of the spiral-wound net ribbons are somewhat spaced apart from-each other inorder to make the figures clearer, but in practice the turns are disposed close to each other. Beneath the net ribbon spiral there is provided a cup-shaped metal net 36 secured to the ring 34. i

The fuel in the receptacle is kept at such a level that the net 36 dips down in the fuel to a certain degree, whereby fuel and preheated air pass through the gasifying member 3| up to the combustion chamber 31 formed by the funnel l4, and during the passage through the gasifying member the fuel becomes entirely vaporized. On the ring l8 there is placed a cylinder 38 interiorly lined with a fire-proof material 39 forming a space 40 where the combustible gases are finally burned.

What we claim is: r

1. An oil burner comprising a cylindrical casing having an open upper end, an oil receptacle mounted within the lower portion of said casing and spaced therefrom, a conical combustion chamber open at both ends, positioned within but spaced from the upper portion of said casing and extending into but spaced from said oil receptacle, a non-combustiblev permeable body having a convex bottom surface mounted across and below the lower open end of said combustion chamber forming the bottom thereof, means for supplying fuel oil into the bottom of said oil receptacle, an air supply pipe opening into the lower portion of said casing and means for supporting said combustion chamber mounted on the open end of said casing and closing the space between the upper edges of said chamber and the wall of said casing,

2. An oil burner as claimed in claim 1 wherein said permeable body consists of a closely woven spirally wound metallic wire net mounted in a basket of similar material.

3. An oil burner as claimed in claim 1 wherein means are mounted on said oil receptacle in the space between said casing and said oil receptacle capable of imparting a rotational movement to the incoming air before it enters the space between the upper edge of said oil receptacle and said combustion chamber.

BENGT ANDERSSON. KARL ERIK VILHELM QVARFORDT.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,583,025 Sturgis l May 4. 1926 FOREIGN PATENTS Number Country Date 59,363 Austria May 26, 1913 465,736 England May 1.3, 1937 

